0,0 → 1,2610 |
/* Support for the generic parts of COFF, for BFD. |
Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, |
2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009 |
Free Software Foundation, Inc. |
Written by Cygnus Support. |
|
This file is part of BFD, the Binary File Descriptor library. |
|
This program is free software; you can redistribute it and/or modify |
it under the terms of the GNU General Public License as published by |
the Free Software Foundation; either version 3 of the License, or |
(at your option) any later version. |
|
This program is distributed in the hope that it will be useful, |
but WITHOUT ANY WARRANTY; without even the implied warranty of |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
GNU General Public License for more details. |
|
You should have received a copy of the GNU General Public License |
along with this program; if not, write to the Free Software |
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
MA 02110-1301, USA. */ |
|
/* Most of this hacked by Steve Chamberlain, sac@cygnus.com. |
Split out of coffcode.h by Ian Taylor, ian@cygnus.com. */ |
|
/* This file contains COFF code that is not dependent on any |
particular COFF target. There is only one version of this file in |
libbfd.a, so no target specific code may be put in here. Or, to |
put it another way, |
|
********** DO NOT PUT TARGET SPECIFIC CODE IN THIS FILE ********** |
|
If you need to add some target specific behaviour, add a new hook |
function to bfd_coff_backend_data. |
|
Some of these functions are also called by the ECOFF routines. |
Those functions may not use any COFF specific information, such as |
coff_data (abfd). */ |
|
#include "sysdep.h" |
#include "bfd.h" |
#include "libbfd.h" |
#include "coff/internal.h" |
#include "libcoff.h" |
|
/* Take a section header read from a coff file (in HOST byte order), |
and make a BFD "section" out of it. This is used by ECOFF. */ |
|
static bfd_boolean |
make_a_section_from_file (bfd *abfd, |
struct internal_scnhdr *hdr, |
unsigned int target_index) |
{ |
asection *return_section; |
char *name; |
bfd_boolean result = TRUE; |
flagword flags; |
|
name = NULL; |
|
/* Handle long section names as in PE. On reading, we want to |
accept long names if the format permits them at all, regardless |
of the current state of the flag that dictates if we would generate |
them in outputs; this construct checks if that is the case by |
attempting to set the flag, without changing its state; the call |
will fail for formats that do not support long names at all. */ |
if (bfd_coff_set_long_section_names (abfd, bfd_coff_long_section_names (abfd)) |
&& hdr->s_name[0] == '/') |
{ |
char buf[SCNNMLEN]; |
long strindex; |
char *p; |
const char *strings; |
|
/* Flag that this BFD uses long names, even though the format might |
expect them to be off by default. This won't directly affect the |
format of any output BFD created from this one, but the information |
can be used to decide what to do. */ |
bfd_coff_set_long_section_names (abfd, TRUE); |
memcpy (buf, hdr->s_name + 1, SCNNMLEN - 1); |
buf[SCNNMLEN - 1] = '\0'; |
strindex = strtol (buf, &p, 10); |
if (*p == '\0' && strindex >= 0) |
{ |
strings = _bfd_coff_read_string_table (abfd); |
if (strings == NULL) |
return FALSE; |
/* FIXME: For extra safety, we should make sure that |
strindex does not run us past the end, but right now we |
don't know the length of the string table. */ |
strings += strindex; |
name = (char *) bfd_alloc (abfd, |
(bfd_size_type) strlen (strings) + 1 + 1); |
if (name == NULL) |
return FALSE; |
strcpy (name, strings); |
} |
} |
|
if (name == NULL) |
{ |
/* Assorted wastage to null-terminate the name, thanks AT&T! */ |
name = (char *) bfd_alloc (abfd, |
(bfd_size_type) sizeof (hdr->s_name) + 1 + 1); |
if (name == NULL) |
return FALSE; |
strncpy (name, (char *) &hdr->s_name[0], sizeof (hdr->s_name)); |
name[sizeof (hdr->s_name)] = 0; |
} |
|
return_section = bfd_make_section_anyway (abfd, name); |
if (return_section == NULL) |
return FALSE; |
|
return_section->vma = hdr->s_vaddr; |
return_section->lma = hdr->s_paddr; |
return_section->size = hdr->s_size; |
return_section->filepos = hdr->s_scnptr; |
return_section->rel_filepos = hdr->s_relptr; |
return_section->reloc_count = hdr->s_nreloc; |
|
bfd_coff_set_alignment_hook (abfd, return_section, hdr); |
|
return_section->line_filepos = hdr->s_lnnoptr; |
|
return_section->lineno_count = hdr->s_nlnno; |
return_section->userdata = NULL; |
return_section->next = NULL; |
return_section->target_index = target_index; |
|
if (! bfd_coff_styp_to_sec_flags_hook (abfd, hdr, name, return_section, |
& flags)) |
result = FALSE; |
|
return_section->flags = flags; |
|
/* At least on i386-coff, the line number count for a shared library |
section must be ignored. */ |
if ((return_section->flags & SEC_COFF_SHARED_LIBRARY) != 0) |
return_section->lineno_count = 0; |
|
if (hdr->s_nreloc != 0) |
return_section->flags |= SEC_RELOC; |
/* FIXME: should this check 'hdr->s_size > 0'. */ |
if (hdr->s_scnptr != 0) |
return_section->flags |= SEC_HAS_CONTENTS; |
|
/* Compress/decompress DWARF debug sections with names: .debug_* and |
.zdebug_*, after the section flags is set. */ |
if ((flags & SEC_DEBUGGING) |
&& ((name[1] == 'd' && name[6] == '_') |
|| (name[1] == 'z' && name[7] == '_'))) |
{ |
enum { nothing, compress, decompress } action = nothing; |
char *new_name = NULL; |
|
if (bfd_is_section_compressed (abfd, return_section)) |
{ |
/* Compressed section. Check if we should decompress. */ |
if ((abfd->flags & BFD_DECOMPRESS)) |
action = decompress; |
} |
else if (!bfd_is_section_compressed (abfd, return_section)) |
{ |
/* Normal section. Check if we should compress. */ |
if ((abfd->flags & BFD_COMPRESS) && return_section->size != 0) |
action = compress; |
} |
|
switch (action) |
{ |
case nothing: |
break; |
case compress: |
if (!bfd_init_section_compress_status (abfd, return_section)) |
{ |
(*_bfd_error_handler) |
(_("%B: unable to initialize compress status for section %s"), |
abfd, name); |
return FALSE; |
} |
if (name[1] != 'z') |
{ |
unsigned int len = strlen (name); |
|
new_name = bfd_alloc (abfd, len + 2); |
if (new_name == NULL) |
return FALSE; |
new_name[0] = '.'; |
new_name[1] = 'z'; |
memcpy (new_name + 2, name + 1, len); |
} |
break; |
case decompress: |
if (!bfd_init_section_decompress_status (abfd, return_section)) |
{ |
(*_bfd_error_handler) |
(_("%B: unable to initialize decompress status for section %s"), |
abfd, name); |
return FALSE; |
} |
if (name[1] == 'z') |
{ |
unsigned int len = strlen (name); |
|
new_name = bfd_alloc (abfd, len); |
if (new_name == NULL) |
return FALSE; |
new_name[0] = '.'; |
memcpy (new_name + 1, name + 2, len - 1); |
} |
break; |
} |
if (new_name != NULL) |
bfd_rename_section (abfd, return_section, new_name); |
} |
|
return result; |
} |
|
/* Read in a COFF object and make it into a BFD. This is used by |
ECOFF as well. */ |
const bfd_target * |
coff_real_object_p (bfd *, |
unsigned, |
struct internal_filehdr *, |
struct internal_aouthdr *); |
const bfd_target * |
coff_real_object_p (bfd *abfd, |
unsigned nscns, |
struct internal_filehdr *internal_f, |
struct internal_aouthdr *internal_a) |
{ |
flagword oflags = abfd->flags; |
bfd_vma ostart = bfd_get_start_address (abfd); |
void * tdata; |
void * tdata_save; |
bfd_size_type readsize; /* Length of file_info. */ |
unsigned int scnhsz; |
char *external_sections; |
|
if (!(internal_f->f_flags & F_RELFLG)) |
abfd->flags |= HAS_RELOC; |
if ((internal_f->f_flags & F_EXEC)) |
abfd->flags |= EXEC_P; |
if (!(internal_f->f_flags & F_LNNO)) |
abfd->flags |= HAS_LINENO; |
if (!(internal_f->f_flags & F_LSYMS)) |
abfd->flags |= HAS_LOCALS; |
|
/* FIXME: How can we set D_PAGED correctly? */ |
if ((internal_f->f_flags & F_EXEC) != 0) |
abfd->flags |= D_PAGED; |
|
bfd_get_symcount (abfd) = internal_f->f_nsyms; |
if (internal_f->f_nsyms) |
abfd->flags |= HAS_SYMS; |
|
if (internal_a != (struct internal_aouthdr *) NULL) |
bfd_get_start_address (abfd) = internal_a->entry; |
else |
bfd_get_start_address (abfd) = 0; |
|
/* Set up the tdata area. ECOFF uses its own routine, and overrides |
abfd->flags. */ |
tdata_save = abfd->tdata.any; |
tdata = bfd_coff_mkobject_hook (abfd, (void *) internal_f, (void *) internal_a); |
if (tdata == NULL) |
goto fail2; |
|
scnhsz = bfd_coff_scnhsz (abfd); |
readsize = (bfd_size_type) nscns * scnhsz; |
external_sections = (char *) bfd_alloc (abfd, readsize); |
if (!external_sections) |
goto fail; |
|
if (bfd_bread ((void *) external_sections, readsize, abfd) != readsize) |
goto fail; |
|
/* Set the arch/mach *before* swapping in sections; section header swapping |
may depend on arch/mach info. */ |
if (! bfd_coff_set_arch_mach_hook (abfd, (void *) internal_f)) |
goto fail; |
|
/* Now copy data as required; construct all asections etc. */ |
if (nscns != 0) |
{ |
unsigned int i; |
for (i = 0; i < nscns; i++) |
{ |
struct internal_scnhdr tmp; |
bfd_coff_swap_scnhdr_in (abfd, |
(void *) (external_sections + i * scnhsz), |
(void *) & tmp); |
if (! make_a_section_from_file (abfd, &tmp, i + 1)) |
goto fail; |
} |
} |
|
return abfd->xvec; |
|
fail: |
bfd_release (abfd, tdata); |
fail2: |
abfd->tdata.any = tdata_save; |
abfd->flags = oflags; |
bfd_get_start_address (abfd) = ostart; |
return (const bfd_target *) NULL; |
} |
|
/* Turn a COFF file into a BFD, but fail with bfd_error_wrong_format if it is |
not a COFF file. This is also used by ECOFF. */ |
|
const bfd_target * |
coff_object_p (bfd *abfd) |
{ |
bfd_size_type filhsz; |
bfd_size_type aoutsz; |
unsigned int nscns; |
void * filehdr; |
struct internal_filehdr internal_f; |
struct internal_aouthdr internal_a; |
|
/* Figure out how much to read. */ |
filhsz = bfd_coff_filhsz (abfd); |
aoutsz = bfd_coff_aoutsz (abfd); |
|
filehdr = bfd_alloc (abfd, filhsz); |
if (filehdr == NULL) |
return NULL; |
if (bfd_bread (filehdr, filhsz, abfd) != filhsz) |
{ |
if (bfd_get_error () != bfd_error_system_call) |
bfd_set_error (bfd_error_wrong_format); |
bfd_release (abfd, filehdr); |
return NULL; |
} |
bfd_coff_swap_filehdr_in (abfd, filehdr, &internal_f); |
bfd_release (abfd, filehdr); |
|
/* The XCOFF format has two sizes for the f_opthdr. SMALL_AOUTSZ |
(less than aoutsz) used in object files and AOUTSZ (equal to |
aoutsz) in executables. The bfd_coff_swap_aouthdr_in function |
expects this header to be aoutsz bytes in length, so we use that |
value in the call to bfd_alloc below. But we must be careful to |
only read in f_opthdr bytes in the call to bfd_bread. We should |
also attempt to catch corrupt or non-COFF binaries with a strange |
value for f_opthdr. */ |
if (! bfd_coff_bad_format_hook (abfd, &internal_f) |
|| internal_f.f_opthdr > aoutsz) |
{ |
bfd_set_error (bfd_error_wrong_format); |
return NULL; |
} |
nscns = internal_f.f_nscns; |
|
if (internal_f.f_opthdr) |
{ |
void * opthdr; |
|
opthdr = bfd_alloc (abfd, aoutsz); |
if (opthdr == NULL) |
return NULL; |
if (bfd_bread (opthdr, (bfd_size_type) internal_f.f_opthdr, abfd) |
!= internal_f.f_opthdr) |
{ |
bfd_release (abfd, opthdr); |
return NULL; |
} |
bfd_coff_swap_aouthdr_in (abfd, opthdr, (void *) &internal_a); |
bfd_release (abfd, opthdr); |
} |
|
return coff_real_object_p (abfd, nscns, &internal_f, |
(internal_f.f_opthdr != 0 |
? &internal_a |
: (struct internal_aouthdr *) NULL)); |
} |
|
/* Get the BFD section from a COFF symbol section number. */ |
|
asection * |
coff_section_from_bfd_index (bfd *abfd, int section_index) |
{ |
struct bfd_section *answer = abfd->sections; |
|
if (section_index == N_ABS) |
return bfd_abs_section_ptr; |
if (section_index == N_UNDEF) |
return bfd_und_section_ptr; |
if (section_index == N_DEBUG) |
return bfd_abs_section_ptr; |
|
while (answer) |
{ |
if (answer->target_index == section_index) |
return answer; |
answer = answer->next; |
} |
|
/* We should not reach this point, but the SCO 3.2v4 /lib/libc_s.a |
has a bad symbol table in biglitpow.o. */ |
return bfd_und_section_ptr; |
} |
|
/* Get the upper bound of a COFF symbol table. */ |
|
long |
coff_get_symtab_upper_bound (bfd *abfd) |
{ |
if (!bfd_coff_slurp_symbol_table (abfd)) |
return -1; |
|
return (bfd_get_symcount (abfd) + 1) * (sizeof (coff_symbol_type *)); |
} |
|
/* Canonicalize a COFF symbol table. */ |
|
long |
coff_canonicalize_symtab (bfd *abfd, asymbol **alocation) |
{ |
unsigned int counter; |
coff_symbol_type *symbase; |
coff_symbol_type **location = (coff_symbol_type **) alocation; |
|
if (!bfd_coff_slurp_symbol_table (abfd)) |
return -1; |
|
symbase = obj_symbols (abfd); |
counter = bfd_get_symcount (abfd); |
while (counter-- > 0) |
*location++ = symbase++; |
|
*location = NULL; |
|
return bfd_get_symcount (abfd); |
} |
|
/* Get the name of a symbol. The caller must pass in a buffer of size |
>= SYMNMLEN + 1. */ |
|
const char * |
_bfd_coff_internal_syment_name (bfd *abfd, |
const struct internal_syment *sym, |
char *buf) |
{ |
/* FIXME: It's not clear this will work correctly if sizeof |
(_n_zeroes) != 4. */ |
if (sym->_n._n_n._n_zeroes != 0 |
|| sym->_n._n_n._n_offset == 0) |
{ |
memcpy (buf, sym->_n._n_name, SYMNMLEN); |
buf[SYMNMLEN] = '\0'; |
return buf; |
} |
else |
{ |
const char *strings; |
|
BFD_ASSERT (sym->_n._n_n._n_offset >= STRING_SIZE_SIZE); |
strings = obj_coff_strings (abfd); |
if (strings == NULL) |
{ |
strings = _bfd_coff_read_string_table (abfd); |
if (strings == NULL) |
return NULL; |
} |
return strings + sym->_n._n_n._n_offset; |
} |
} |
|
/* Read in and swap the relocs. This returns a buffer holding the |
relocs for section SEC in file ABFD. If CACHE is TRUE and |
INTERNAL_RELOCS is NULL, the relocs read in will be saved in case |
the function is called again. If EXTERNAL_RELOCS is not NULL, it |
is a buffer large enough to hold the unswapped relocs. If |
INTERNAL_RELOCS is not NULL, it is a buffer large enough to hold |
the swapped relocs. If REQUIRE_INTERNAL is TRUE, then the return |
value must be INTERNAL_RELOCS. The function returns NULL on error. */ |
|
struct internal_reloc * |
_bfd_coff_read_internal_relocs (bfd *abfd, |
asection *sec, |
bfd_boolean cache, |
bfd_byte *external_relocs, |
bfd_boolean require_internal, |
struct internal_reloc *internal_relocs) |
{ |
bfd_size_type relsz; |
bfd_byte *free_external = NULL; |
struct internal_reloc *free_internal = NULL; |
bfd_byte *erel; |
bfd_byte *erel_end; |
struct internal_reloc *irel; |
bfd_size_type amt; |
|
if (sec->reloc_count == 0) |
return internal_relocs; /* Nothing to do. */ |
|
if (coff_section_data (abfd, sec) != NULL |
&& coff_section_data (abfd, sec)->relocs != NULL) |
{ |
if (! require_internal) |
return coff_section_data (abfd, sec)->relocs; |
memcpy (internal_relocs, coff_section_data (abfd, sec)->relocs, |
sec->reloc_count * sizeof (struct internal_reloc)); |
return internal_relocs; |
} |
|
relsz = bfd_coff_relsz (abfd); |
|
amt = sec->reloc_count * relsz; |
if (external_relocs == NULL) |
{ |
free_external = (bfd_byte *) bfd_malloc (amt); |
if (free_external == NULL) |
goto error_return; |
external_relocs = free_external; |
} |
|
if (bfd_seek (abfd, sec->rel_filepos, SEEK_SET) != 0 |
|| bfd_bread (external_relocs, amt, abfd) != amt) |
goto error_return; |
|
if (internal_relocs == NULL) |
{ |
amt = sec->reloc_count; |
amt *= sizeof (struct internal_reloc); |
free_internal = (struct internal_reloc *) bfd_malloc (amt); |
if (free_internal == NULL) |
goto error_return; |
internal_relocs = free_internal; |
} |
|
/* Swap in the relocs. */ |
erel = external_relocs; |
erel_end = erel + relsz * sec->reloc_count; |
irel = internal_relocs; |
for (; erel < erel_end; erel += relsz, irel++) |
bfd_coff_swap_reloc_in (abfd, (void *) erel, (void *) irel); |
|
if (free_external != NULL) |
{ |
free (free_external); |
free_external = NULL; |
} |
|
if (cache && free_internal != NULL) |
{ |
if (coff_section_data (abfd, sec) == NULL) |
{ |
amt = sizeof (struct coff_section_tdata); |
sec->used_by_bfd = bfd_zalloc (abfd, amt); |
if (sec->used_by_bfd == NULL) |
goto error_return; |
coff_section_data (abfd, sec)->contents = NULL; |
} |
coff_section_data (abfd, sec)->relocs = free_internal; |
} |
|
return internal_relocs; |
|
error_return: |
if (free_external != NULL) |
free (free_external); |
if (free_internal != NULL) |
free (free_internal); |
return NULL; |
} |
|
/* Set lineno_count for the output sections of a COFF file. */ |
|
int |
coff_count_linenumbers (bfd *abfd) |
{ |
unsigned int limit = bfd_get_symcount (abfd); |
unsigned int i; |
int total = 0; |
asymbol **p; |
asection *s; |
|
if (limit == 0) |
{ |
/* This may be from the backend linker, in which case the |
lineno_count in the sections is correct. */ |
for (s = abfd->sections; s != NULL; s = s->next) |
total += s->lineno_count; |
return total; |
} |
|
for (s = abfd->sections; s != NULL; s = s->next) |
BFD_ASSERT (s->lineno_count == 0); |
|
for (p = abfd->outsymbols, i = 0; i < limit; i++, p++) |
{ |
asymbol *q_maybe = *p; |
|
if (bfd_family_coff (bfd_asymbol_bfd (q_maybe))) |
{ |
coff_symbol_type *q = coffsymbol (q_maybe); |
|
/* The AIX 4.1 compiler can sometimes generate line numbers |
attached to debugging symbols. We try to simply ignore |
those here. */ |
if (q->lineno != NULL |
&& q->symbol.section->owner != NULL) |
{ |
/* This symbol has line numbers. Increment the owning |
section's linenumber count. */ |
alent *l = q->lineno; |
|
do |
{ |
asection * sec = q->symbol.section->output_section; |
|
/* Do not try to update fields in read-only sections. */ |
if (! bfd_is_const_section (sec)) |
sec->lineno_count ++; |
|
++total; |
++l; |
} |
while (l->line_number != 0); |
} |
} |
} |
|
return total; |
} |
|
/* Takes a bfd and a symbol, returns a pointer to the coff specific |
area of the symbol if there is one. */ |
|
coff_symbol_type * |
coff_symbol_from (bfd *ignore_abfd ATTRIBUTE_UNUSED, |
asymbol *symbol) |
{ |
if (!bfd_family_coff (bfd_asymbol_bfd (symbol))) |
return (coff_symbol_type *) NULL; |
|
if (bfd_asymbol_bfd (symbol)->tdata.coff_obj_data == (coff_data_type *) NULL) |
return (coff_symbol_type *) NULL; |
|
return (coff_symbol_type *) symbol; |
} |
|
static void |
fixup_symbol_value (bfd *abfd, |
coff_symbol_type *coff_symbol_ptr, |
struct internal_syment *syment) |
{ |
/* Normalize the symbol flags. */ |
if (coff_symbol_ptr->symbol.section |
&& bfd_is_com_section (coff_symbol_ptr->symbol.section)) |
{ |
/* A common symbol is undefined with a value. */ |
syment->n_scnum = N_UNDEF; |
syment->n_value = coff_symbol_ptr->symbol.value; |
} |
else if ((coff_symbol_ptr->symbol.flags & BSF_DEBUGGING) != 0 |
&& (coff_symbol_ptr->symbol.flags & BSF_DEBUGGING_RELOC) == 0) |
{ |
syment->n_value = coff_symbol_ptr->symbol.value; |
} |
else if (bfd_is_und_section (coff_symbol_ptr->symbol.section)) |
{ |
syment->n_scnum = N_UNDEF; |
syment->n_value = 0; |
} |
/* FIXME: Do we need to handle the absolute section here? */ |
else |
{ |
if (coff_symbol_ptr->symbol.section) |
{ |
syment->n_scnum = |
coff_symbol_ptr->symbol.section->output_section->target_index; |
|
syment->n_value = (coff_symbol_ptr->symbol.value |
+ coff_symbol_ptr->symbol.section->output_offset); |
if (! obj_pe (abfd)) |
{ |
syment->n_value += (syment->n_sclass == C_STATLAB) |
? coff_symbol_ptr->symbol.section->output_section->lma |
: coff_symbol_ptr->symbol.section->output_section->vma; |
} |
} |
else |
{ |
BFD_ASSERT (0); |
/* This can happen, but I don't know why yet (steve@cygnus.com) */ |
syment->n_scnum = N_ABS; |
syment->n_value = coff_symbol_ptr->symbol.value; |
} |
} |
} |
|
/* Run through all the symbols in the symbol table and work out what |
their indexes into the symbol table will be when output. |
|
Coff requires that each C_FILE symbol points to the next one in the |
chain, and that the last one points to the first external symbol. We |
do that here too. */ |
|
bfd_boolean |
coff_renumber_symbols (bfd *bfd_ptr, int *first_undef) |
{ |
unsigned int symbol_count = bfd_get_symcount (bfd_ptr); |
asymbol **symbol_ptr_ptr = bfd_ptr->outsymbols; |
unsigned int native_index = 0; |
struct internal_syment *last_file = NULL; |
unsigned int symbol_index; |
|
/* COFF demands that undefined symbols come after all other symbols. |
Since we don't need to impose this extra knowledge on all our |
client programs, deal with that here. Sort the symbol table; |
just move the undefined symbols to the end, leaving the rest |
alone. The O'Reilly book says that defined global symbols come |
at the end before the undefined symbols, so we do that here as |
well. */ |
/* @@ Do we have some condition we could test for, so we don't always |
have to do this? I don't think relocatability is quite right, but |
I'm not certain. [raeburn:19920508.1711EST] */ |
{ |
asymbol **newsyms; |
unsigned int i; |
bfd_size_type amt; |
|
amt = sizeof (asymbol *) * ((bfd_size_type) symbol_count + 1); |
newsyms = (asymbol **) bfd_alloc (bfd_ptr, amt); |
if (!newsyms) |
return FALSE; |
bfd_ptr->outsymbols = newsyms; |
for (i = 0; i < symbol_count; i++) |
if ((symbol_ptr_ptr[i]->flags & BSF_NOT_AT_END) != 0 |
|| (!bfd_is_und_section (symbol_ptr_ptr[i]->section) |
&& !bfd_is_com_section (symbol_ptr_ptr[i]->section) |
&& ((symbol_ptr_ptr[i]->flags & BSF_FUNCTION) != 0 |
|| ((symbol_ptr_ptr[i]->flags & (BSF_GLOBAL | BSF_WEAK)) |
== 0)))) |
*newsyms++ = symbol_ptr_ptr[i]; |
|
for (i = 0; i < symbol_count; i++) |
if ((symbol_ptr_ptr[i]->flags & BSF_NOT_AT_END) == 0 |
&& !bfd_is_und_section (symbol_ptr_ptr[i]->section) |
&& (bfd_is_com_section (symbol_ptr_ptr[i]->section) |
|| ((symbol_ptr_ptr[i]->flags & BSF_FUNCTION) == 0 |
&& ((symbol_ptr_ptr[i]->flags & (BSF_GLOBAL | BSF_WEAK)) |
!= 0)))) |
*newsyms++ = symbol_ptr_ptr[i]; |
|
*first_undef = newsyms - bfd_ptr->outsymbols; |
|
for (i = 0; i < symbol_count; i++) |
if ((symbol_ptr_ptr[i]->flags & BSF_NOT_AT_END) == 0 |
&& bfd_is_und_section (symbol_ptr_ptr[i]->section)) |
*newsyms++ = symbol_ptr_ptr[i]; |
*newsyms = (asymbol *) NULL; |
symbol_ptr_ptr = bfd_ptr->outsymbols; |
} |
|
for (symbol_index = 0; symbol_index < symbol_count; symbol_index++) |
{ |
coff_symbol_type *coff_symbol_ptr = coff_symbol_from (bfd_ptr, symbol_ptr_ptr[symbol_index]); |
symbol_ptr_ptr[symbol_index]->udata.i = symbol_index; |
if (coff_symbol_ptr && coff_symbol_ptr->native) |
{ |
combined_entry_type *s = coff_symbol_ptr->native; |
int i; |
|
if (s->u.syment.n_sclass == C_FILE) |
{ |
if (last_file != NULL) |
last_file->n_value = native_index; |
last_file = &(s->u.syment); |
} |
else |
/* Modify the symbol values according to their section and |
type. */ |
fixup_symbol_value (bfd_ptr, coff_symbol_ptr, &(s->u.syment)); |
|
for (i = 0; i < s->u.syment.n_numaux + 1; i++) |
s[i].offset = native_index++; |
} |
else |
native_index++; |
} |
|
obj_conv_table_size (bfd_ptr) = native_index; |
|
return TRUE; |
} |
|
/* Run thorough the symbol table again, and fix it so that all |
pointers to entries are changed to the entries' index in the output |
symbol table. */ |
|
void |
coff_mangle_symbols (bfd *bfd_ptr) |
{ |
unsigned int symbol_count = bfd_get_symcount (bfd_ptr); |
asymbol **symbol_ptr_ptr = bfd_ptr->outsymbols; |
unsigned int symbol_index; |
|
for (symbol_index = 0; symbol_index < symbol_count; symbol_index++) |
{ |
coff_symbol_type *coff_symbol_ptr = |
coff_symbol_from (bfd_ptr, symbol_ptr_ptr[symbol_index]); |
|
if (coff_symbol_ptr && coff_symbol_ptr->native) |
{ |
int i; |
combined_entry_type *s = coff_symbol_ptr->native; |
|
if (s->fix_value) |
{ |
/* FIXME: We should use a union here. */ |
s->u.syment.n_value = |
(bfd_hostptr_t) ((combined_entry_type *) |
((bfd_hostptr_t) s->u.syment.n_value))->offset; |
s->fix_value = 0; |
} |
if (s->fix_line) |
{ |
/* The value is the offset into the line number entries |
for the symbol's section. On output, the symbol's |
section should be N_DEBUG. */ |
s->u.syment.n_value = |
(coff_symbol_ptr->symbol.section->output_section->line_filepos |
+ s->u.syment.n_value * bfd_coff_linesz (bfd_ptr)); |
coff_symbol_ptr->symbol.section = |
coff_section_from_bfd_index (bfd_ptr, N_DEBUG); |
BFD_ASSERT (coff_symbol_ptr->symbol.flags & BSF_DEBUGGING); |
} |
for (i = 0; i < s->u.syment.n_numaux; i++) |
{ |
combined_entry_type *a = s + i + 1; |
if (a->fix_tag) |
{ |
a->u.auxent.x_sym.x_tagndx.l = |
a->u.auxent.x_sym.x_tagndx.p->offset; |
a->fix_tag = 0; |
} |
if (a->fix_end) |
{ |
a->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l = |
a->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p->offset; |
a->fix_end = 0; |
} |
if (a->fix_scnlen) |
{ |
a->u.auxent.x_csect.x_scnlen.l = |
a->u.auxent.x_csect.x_scnlen.p->offset; |
a->fix_scnlen = 0; |
} |
} |
} |
} |
} |
|
static void |
coff_fix_symbol_name (bfd *abfd, |
asymbol *symbol, |
combined_entry_type *native, |
bfd_size_type *string_size_p, |
asection **debug_string_section_p, |
bfd_size_type *debug_string_size_p) |
{ |
unsigned int name_length; |
union internal_auxent *auxent; |
char *name = (char *) (symbol->name); |
|
if (name == NULL) |
{ |
/* COFF symbols always have names, so we'll make one up. */ |
symbol->name = "strange"; |
name = (char *) symbol->name; |
} |
name_length = strlen (name); |
|
if (native->u.syment.n_sclass == C_FILE |
&& native->u.syment.n_numaux > 0) |
{ |
unsigned int filnmlen; |
|
if (bfd_coff_force_symnames_in_strings (abfd)) |
{ |
native->u.syment._n._n_n._n_offset = |
(*string_size_p + STRING_SIZE_SIZE); |
native->u.syment._n._n_n._n_zeroes = 0; |
*string_size_p += 6; /* strlen(".file") + 1 */ |
} |
else |
strncpy (native->u.syment._n._n_name, ".file", SYMNMLEN); |
|
auxent = &(native + 1)->u.auxent; |
|
filnmlen = bfd_coff_filnmlen (abfd); |
|
if (bfd_coff_long_filenames (abfd)) |
{ |
if (name_length <= filnmlen) |
strncpy (auxent->x_file.x_fname, name, filnmlen); |
else |
{ |
auxent->x_file.x_n.x_offset = *string_size_p + STRING_SIZE_SIZE; |
auxent->x_file.x_n.x_zeroes = 0; |
*string_size_p += name_length + 1; |
} |
} |
else |
{ |
strncpy (auxent->x_file.x_fname, name, filnmlen); |
if (name_length > filnmlen) |
name[filnmlen] = '\0'; |
} |
} |
else |
{ |
if (name_length <= SYMNMLEN && !bfd_coff_force_symnames_in_strings (abfd)) |
/* This name will fit into the symbol neatly. */ |
strncpy (native->u.syment._n._n_name, symbol->name, SYMNMLEN); |
|
else if (!bfd_coff_symname_in_debug (abfd, &native->u.syment)) |
{ |
native->u.syment._n._n_n._n_offset = (*string_size_p |
+ STRING_SIZE_SIZE); |
native->u.syment._n._n_n._n_zeroes = 0; |
*string_size_p += name_length + 1; |
} |
else |
{ |
file_ptr filepos; |
bfd_byte buf[4]; |
int prefix_len = bfd_coff_debug_string_prefix_length (abfd); |
|
/* This name should be written into the .debug section. For |
some reason each name is preceded by a two byte length |
and also followed by a null byte. FIXME: We assume that |
the .debug section has already been created, and that it |
is large enough. */ |
if (*debug_string_section_p == (asection *) NULL) |
*debug_string_section_p = bfd_get_section_by_name (abfd, ".debug"); |
filepos = bfd_tell (abfd); |
if (prefix_len == 4) |
bfd_put_32 (abfd, (bfd_vma) (name_length + 1), buf); |
else |
bfd_put_16 (abfd, (bfd_vma) (name_length + 1), buf); |
|
if (!bfd_set_section_contents (abfd, |
*debug_string_section_p, |
(void *) buf, |
(file_ptr) *debug_string_size_p, |
(bfd_size_type) prefix_len) |
|| !bfd_set_section_contents (abfd, |
*debug_string_section_p, |
(void *) symbol->name, |
(file_ptr) (*debug_string_size_p |
+ prefix_len), |
(bfd_size_type) name_length + 1)) |
abort (); |
if (bfd_seek (abfd, filepos, SEEK_SET) != 0) |
abort (); |
native->u.syment._n._n_n._n_offset = |
*debug_string_size_p + prefix_len; |
native->u.syment._n._n_n._n_zeroes = 0; |
*debug_string_size_p += name_length + 1 + prefix_len; |
} |
} |
} |
|
/* We need to keep track of the symbol index so that when we write out |
the relocs we can get the index for a symbol. This method is a |
hack. FIXME. */ |
|
#define set_index(symbol, idx) ((symbol)->udata.i = (idx)) |
|
/* Write a symbol out to a COFF file. */ |
|
static bfd_boolean |
coff_write_symbol (bfd *abfd, |
asymbol *symbol, |
combined_entry_type *native, |
bfd_vma *written, |
bfd_size_type *string_size_p, |
asection **debug_string_section_p, |
bfd_size_type *debug_string_size_p) |
{ |
unsigned int numaux = native->u.syment.n_numaux; |
int type = native->u.syment.n_type; |
int n_sclass = (int) native->u.syment.n_sclass; |
asection *output_section = symbol->section->output_section |
? symbol->section->output_section |
: symbol->section; |
void * buf; |
bfd_size_type symesz; |
|
if (native->u.syment.n_sclass == C_FILE) |
symbol->flags |= BSF_DEBUGGING; |
|
if (symbol->flags & BSF_DEBUGGING |
&& bfd_is_abs_section (symbol->section)) |
native->u.syment.n_scnum = N_DEBUG; |
|
else if (bfd_is_abs_section (symbol->section)) |
native->u.syment.n_scnum = N_ABS; |
|
else if (bfd_is_und_section (symbol->section)) |
native->u.syment.n_scnum = N_UNDEF; |
|
else |
native->u.syment.n_scnum = |
output_section->target_index; |
|
coff_fix_symbol_name (abfd, symbol, native, string_size_p, |
debug_string_section_p, debug_string_size_p); |
|
symesz = bfd_coff_symesz (abfd); |
buf = bfd_alloc (abfd, symesz); |
if (!buf) |
return FALSE; |
bfd_coff_swap_sym_out (abfd, &native->u.syment, buf); |
if (bfd_bwrite (buf, symesz, abfd) != symesz) |
return FALSE; |
bfd_release (abfd, buf); |
|
if (native->u.syment.n_numaux > 0) |
{ |
bfd_size_type auxesz; |
unsigned int j; |
|
auxesz = bfd_coff_auxesz (abfd); |
buf = bfd_alloc (abfd, auxesz); |
if (!buf) |
return FALSE; |
for (j = 0; j < native->u.syment.n_numaux; j++) |
{ |
bfd_coff_swap_aux_out (abfd, |
&((native + j + 1)->u.auxent), |
type, n_sclass, (int) j, |
native->u.syment.n_numaux, |
buf); |
if (bfd_bwrite (buf, auxesz, abfd) != auxesz) |
return FALSE; |
} |
bfd_release (abfd, buf); |
} |
|
/* Store the index for use when we write out the relocs. */ |
set_index (symbol, *written); |
|
*written += numaux + 1; |
return TRUE; |
} |
|
/* Write out a symbol to a COFF file that does not come from a COFF |
file originally. This symbol may have been created by the linker, |
or we may be linking a non COFF file to a COFF file. */ |
|
bfd_boolean |
coff_write_alien_symbol (bfd *abfd, |
asymbol *symbol, |
struct internal_syment *isym, |
bfd_vma *written, |
bfd_size_type *string_size_p, |
asection **debug_string_section_p, |
bfd_size_type *debug_string_size_p) |
{ |
combined_entry_type *native; |
combined_entry_type dummy[2]; |
asection *output_section = symbol->section->output_section |
? symbol->section->output_section |
: symbol->section; |
struct bfd_link_info *link_info = coff_data (abfd)->link_info; |
bfd_boolean ret; |
|
if ((!link_info || link_info->strip_discarded) |
&& !bfd_is_abs_section (symbol->section) |
&& symbol->section->output_section == bfd_abs_section_ptr) |
{ |
symbol->name = ""; |
if (isym != NULL) |
memset (isym, 0, sizeof(*isym)); |
return TRUE; |
} |
native = dummy; |
native->u.syment.n_type = T_NULL; |
native->u.syment.n_flags = 0; |
native->u.syment.n_numaux = 0; |
if (bfd_is_und_section (symbol->section)) |
{ |
native->u.syment.n_scnum = N_UNDEF; |
native->u.syment.n_value = symbol->value; |
} |
else if (bfd_is_com_section (symbol->section)) |
{ |
native->u.syment.n_scnum = N_UNDEF; |
native->u.syment.n_value = symbol->value; |
} |
else if (symbol->flags & BSF_FILE) |
{ |
native->u.syment.n_scnum = N_DEBUG; |
native->u.syment.n_numaux = 1; |
} |
else if (symbol->flags & BSF_DEBUGGING) |
{ |
/* There isn't much point to writing out a debugging symbol |
unless we are prepared to convert it into COFF debugging |
format. So, we just ignore them. We must clobber the symbol |
name to keep it from being put in the string table. */ |
symbol->name = ""; |
if (isym != NULL) |
memset (isym, 0, sizeof(*isym)); |
return TRUE; |
} |
else |
{ |
native->u.syment.n_scnum = output_section->target_index; |
native->u.syment.n_value = (symbol->value |
+ symbol->section->output_offset); |
if (! obj_pe (abfd)) |
native->u.syment.n_value += output_section->vma; |
|
/* Copy the any flags from the file header into the symbol. |
FIXME: Why? */ |
{ |
coff_symbol_type *c = coff_symbol_from (abfd, symbol); |
if (c != (coff_symbol_type *) NULL) |
native->u.syment.n_flags = bfd_asymbol_bfd (&c->symbol)->flags; |
} |
} |
|
native->u.syment.n_type = 0; |
if (symbol->flags & BSF_FILE) |
native->u.syment.n_sclass = C_FILE; |
else if (symbol->flags & BSF_LOCAL) |
native->u.syment.n_sclass = C_STAT; |
else if (symbol->flags & BSF_WEAK) |
native->u.syment.n_sclass = obj_pe (abfd) ? C_NT_WEAK : C_WEAKEXT; |
else |
native->u.syment.n_sclass = C_EXT; |
|
ret = coff_write_symbol (abfd, symbol, native, written, string_size_p, |
debug_string_section_p, debug_string_size_p); |
if (isym != NULL) |
*isym = native->u.syment; |
return ret; |
} |
|
/* Write a native symbol to a COFF file. */ |
|
static bfd_boolean |
coff_write_native_symbol (bfd *abfd, |
coff_symbol_type *symbol, |
bfd_vma *written, |
bfd_size_type *string_size_p, |
asection **debug_string_section_p, |
bfd_size_type *debug_string_size_p) |
{ |
combined_entry_type *native = symbol->native; |
alent *lineno = symbol->lineno; |
struct bfd_link_info *link_info = coff_data (abfd)->link_info; |
|
if ((!link_info || link_info->strip_discarded) |
&& !bfd_is_abs_section (symbol->symbol.section) |
&& symbol->symbol.section->output_section == bfd_abs_section_ptr) |
{ |
symbol->symbol.name = ""; |
return TRUE; |
} |
|
/* If this symbol has an associated line number, we must store the |
symbol index in the line number field. We also tag the auxent to |
point to the right place in the lineno table. */ |
if (lineno && !symbol->done_lineno && symbol->symbol.section->owner != NULL) |
{ |
unsigned int count = 0; |
|
lineno[count].u.offset = *written; |
if (native->u.syment.n_numaux) |
{ |
union internal_auxent *a = &((native + 1)->u.auxent); |
|
a->x_sym.x_fcnary.x_fcn.x_lnnoptr = |
symbol->symbol.section->output_section->moving_line_filepos; |
} |
|
/* Count and relocate all other linenumbers. */ |
count++; |
while (lineno[count].line_number != 0) |
{ |
lineno[count].u.offset += |
(symbol->symbol.section->output_section->vma |
+ symbol->symbol.section->output_offset); |
count++; |
} |
symbol->done_lineno = TRUE; |
|
if (! bfd_is_const_section (symbol->symbol.section->output_section)) |
symbol->symbol.section->output_section->moving_line_filepos += |
count * bfd_coff_linesz (abfd); |
} |
|
return coff_write_symbol (abfd, &(symbol->symbol), native, written, |
string_size_p, debug_string_section_p, |
debug_string_size_p); |
} |
|
static void |
null_error_handler (const char * fmt ATTRIBUTE_UNUSED, ...) |
{ |
} |
|
/* Write out the COFF symbols. */ |
|
bfd_boolean |
coff_write_symbols (bfd *abfd) |
{ |
bfd_size_type string_size; |
asection *debug_string_section; |
bfd_size_type debug_string_size; |
unsigned int i; |
unsigned int limit = bfd_get_symcount (abfd); |
bfd_vma written = 0; |
asymbol **p; |
|
string_size = 0; |
debug_string_section = NULL; |
debug_string_size = 0; |
|
/* If this target supports long section names, they must be put into |
the string table. This is supported by PE. This code must |
handle section names just as they are handled in |
coff_write_object_contents. */ |
if (bfd_coff_long_section_names (abfd)) |
{ |
asection *o; |
|
for (o = abfd->sections; o != NULL; o = o->next) |
{ |
size_t len; |
|
len = strlen (o->name); |
if (len > SCNNMLEN) |
string_size += len + 1; |
} |
} |
|
/* Seek to the right place. */ |
if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0) |
return FALSE; |
|
/* Output all the symbols we have. */ |
written = 0; |
for (p = abfd->outsymbols, i = 0; i < limit; i++, p++) |
{ |
asymbol *symbol = *p; |
coff_symbol_type *c_symbol = coff_symbol_from (abfd, symbol); |
|
if (c_symbol == (coff_symbol_type *) NULL |
|| c_symbol->native == (combined_entry_type *) NULL) |
{ |
if (!coff_write_alien_symbol (abfd, symbol, NULL, &written, |
&string_size, &debug_string_section, |
&debug_string_size)) |
return FALSE; |
} |
else |
{ |
if (coff_backend_info (abfd)->_bfd_coff_classify_symbol != NULL) |
{ |
bfd_error_handler_type current_error_handler; |
enum coff_symbol_classification sym_class; |
unsigned char *n_sclass; |
|
/* Suppress error reporting by bfd_coff_classify_symbol. |
Error messages can be generated when we are processing a local |
symbol which has no associated section and we do not have to |
worry about this, all we need to know is that it is local. */ |
current_error_handler = bfd_set_error_handler (null_error_handler); |
sym_class = bfd_coff_classify_symbol (abfd, |
&c_symbol->native->u.syment); |
(void) bfd_set_error_handler (current_error_handler); |
|
n_sclass = &c_symbol->native->u.syment.n_sclass; |
|
/* If the symbol class has been changed (eg objcopy/ld script/etc) |
we cannot retain the existing sclass from the original symbol. |
Weak symbols only have one valid sclass, so just set it always. |
If it is not local class and should be, set it C_STAT. |
If it is global and not classified as global, or if it is |
weak (which is also classified as global), set it C_EXT. */ |
|
if (symbol->flags & BSF_WEAK) |
*n_sclass = obj_pe (abfd) ? C_NT_WEAK : C_WEAKEXT; |
else if (symbol->flags & BSF_LOCAL && sym_class != COFF_SYMBOL_LOCAL) |
*n_sclass = C_STAT; |
else if (symbol->flags & BSF_GLOBAL |
&& (sym_class != COFF_SYMBOL_GLOBAL |
#ifdef COFF_WITH_PE |
|| *n_sclass == C_NT_WEAK |
#endif |
|| *n_sclass == C_WEAKEXT)) |
c_symbol->native->u.syment.n_sclass = C_EXT; |
} |
|
if (!coff_write_native_symbol (abfd, c_symbol, &written, |
&string_size, &debug_string_section, |
&debug_string_size)) |
return FALSE; |
} |
} |
|
obj_raw_syment_count (abfd) = written; |
|
/* Now write out strings. */ |
if (string_size != 0) |
{ |
unsigned int size = string_size + STRING_SIZE_SIZE; |
bfd_byte buffer[STRING_SIZE_SIZE]; |
|
#if STRING_SIZE_SIZE == 4 |
H_PUT_32 (abfd, size, buffer); |
#else |
#error Change H_PUT_32 |
#endif |
if (bfd_bwrite ((void *) buffer, (bfd_size_type) sizeof (buffer), abfd) |
!= sizeof (buffer)) |
return FALSE; |
|
/* Handle long section names. This code must handle section |
names just as they are handled in coff_write_object_contents. */ |
if (bfd_coff_long_section_names (abfd)) |
{ |
asection *o; |
|
for (o = abfd->sections; o != NULL; o = o->next) |
{ |
size_t len; |
|
len = strlen (o->name); |
if (len > SCNNMLEN) |
{ |
if (bfd_bwrite (o->name, (bfd_size_type) (len + 1), abfd) |
!= len + 1) |
return FALSE; |
} |
} |
} |
|
for (p = abfd->outsymbols, i = 0; |
i < limit; |
i++, p++) |
{ |
asymbol *q = *p; |
size_t name_length = strlen (q->name); |
coff_symbol_type *c_symbol = coff_symbol_from (abfd, q); |
size_t maxlen; |
|
/* Figure out whether the symbol name should go in the string |
table. Symbol names that are short enough are stored |
directly in the syment structure. File names permit a |
different, longer, length in the syment structure. On |
XCOFF, some symbol names are stored in the .debug section |
rather than in the string table. */ |
|
if (c_symbol == NULL |
|| c_symbol->native == NULL) |
/* This is not a COFF symbol, so it certainly is not a |
file name, nor does it go in the .debug section. */ |
maxlen = bfd_coff_force_symnames_in_strings (abfd) ? 0 : SYMNMLEN; |
|
else if (bfd_coff_symname_in_debug (abfd, |
&c_symbol->native->u.syment)) |
/* This symbol name is in the XCOFF .debug section. |
Don't write it into the string table. */ |
maxlen = name_length; |
|
else if (c_symbol->native->u.syment.n_sclass == C_FILE |
&& c_symbol->native->u.syment.n_numaux > 0) |
{ |
if (bfd_coff_force_symnames_in_strings (abfd)) |
{ |
if (bfd_bwrite (".file", (bfd_size_type) 6, abfd) != 6) |
return FALSE; |
} |
maxlen = bfd_coff_filnmlen (abfd); |
} |
else |
maxlen = bfd_coff_force_symnames_in_strings (abfd) ? 0 : SYMNMLEN; |
|
if (name_length > maxlen) |
{ |
if (bfd_bwrite ((void *) (q->name), (bfd_size_type) name_length + 1, |
abfd) != name_length + 1) |
return FALSE; |
} |
} |
} |
else |
{ |
/* We would normally not write anything here, but we'll write |
out 4 so that any stupid coff reader which tries to read the |
string table even when there isn't one won't croak. */ |
unsigned int size = STRING_SIZE_SIZE; |
bfd_byte buffer[STRING_SIZE_SIZE]; |
|
#if STRING_SIZE_SIZE == 4 |
H_PUT_32 (abfd, size, buffer); |
#else |
#error Change H_PUT_32 |
#endif |
if (bfd_bwrite ((void *) buffer, (bfd_size_type) STRING_SIZE_SIZE, abfd) |
!= STRING_SIZE_SIZE) |
return FALSE; |
} |
|
/* Make sure the .debug section was created to be the correct size. |
We should create it ourselves on the fly, but we don't because |
BFD won't let us write to any section until we know how large all |
the sections are. We could still do it by making another pass |
over the symbols. FIXME. */ |
BFD_ASSERT (debug_string_size == 0 |
|| (debug_string_section != (asection *) NULL |
&& (BFD_ALIGN (debug_string_size, |
1 << debug_string_section->alignment_power) |
== debug_string_section->size))); |
|
return TRUE; |
} |
|
bfd_boolean |
coff_write_linenumbers (bfd *abfd) |
{ |
asection *s; |
bfd_size_type linesz; |
void * buff; |
|
linesz = bfd_coff_linesz (abfd); |
buff = bfd_alloc (abfd, linesz); |
if (!buff) |
return FALSE; |
for (s = abfd->sections; s != (asection *) NULL; s = s->next) |
{ |
if (s->lineno_count) |
{ |
asymbol **q = abfd->outsymbols; |
if (bfd_seek (abfd, s->line_filepos, SEEK_SET) != 0) |
return FALSE; |
/* Find all the linenumbers in this section. */ |
while (*q) |
{ |
asymbol *p = *q; |
if (p->section->output_section == s) |
{ |
alent *l = |
BFD_SEND (bfd_asymbol_bfd (p), _get_lineno, |
(bfd_asymbol_bfd (p), p)); |
if (l) |
{ |
/* Found a linenumber entry, output. */ |
struct internal_lineno out; |
memset ((void *) & out, 0, sizeof (out)); |
out.l_lnno = 0; |
out.l_addr.l_symndx = l->u.offset; |
bfd_coff_swap_lineno_out (abfd, &out, buff); |
if (bfd_bwrite (buff, (bfd_size_type) linesz, abfd) |
!= linesz) |
return FALSE; |
l++; |
while (l->line_number) |
{ |
out.l_lnno = l->line_number; |
out.l_addr.l_symndx = l->u.offset; |
bfd_coff_swap_lineno_out (abfd, &out, buff); |
if (bfd_bwrite (buff, (bfd_size_type) linesz, abfd) |
!= linesz) |
return FALSE; |
l++; |
} |
} |
} |
q++; |
} |
} |
} |
bfd_release (abfd, buff); |
return TRUE; |
} |
|
alent * |
coff_get_lineno (bfd *ignore_abfd ATTRIBUTE_UNUSED, asymbol *symbol) |
{ |
return coffsymbol (symbol)->lineno; |
} |
|
/* This function transforms the offsets into the symbol table into |
pointers to syments. */ |
|
static void |
coff_pointerize_aux (bfd *abfd, |
combined_entry_type *table_base, |
combined_entry_type *symbol, |
unsigned int indaux, |
combined_entry_type *auxent) |
{ |
unsigned int type = symbol->u.syment.n_type; |
unsigned int n_sclass = symbol->u.syment.n_sclass; |
|
if (coff_backend_info (abfd)->_bfd_coff_pointerize_aux_hook) |
{ |
if ((*coff_backend_info (abfd)->_bfd_coff_pointerize_aux_hook) |
(abfd, table_base, symbol, indaux, auxent)) |
return; |
} |
|
/* Don't bother if this is a file or a section. */ |
if (n_sclass == C_STAT && type == T_NULL) |
return; |
if (n_sclass == C_FILE) |
return; |
|
/* Otherwise patch up. */ |
#define N_TMASK coff_data (abfd)->local_n_tmask |
#define N_BTSHFT coff_data (abfd)->local_n_btshft |
|
if ((ISFCN (type) || ISTAG (n_sclass) || n_sclass == C_BLOCK |
|| n_sclass == C_FCN) |
&& auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l > 0) |
{ |
auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p = |
table_base + auxent->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l; |
auxent->fix_end = 1; |
} |
/* A negative tagndx is meaningless, but the SCO 3.2v4 cc can |
generate one, so we must be careful to ignore it. */ |
if (auxent->u.auxent.x_sym.x_tagndx.l > 0) |
{ |
auxent->u.auxent.x_sym.x_tagndx.p = |
table_base + auxent->u.auxent.x_sym.x_tagndx.l; |
auxent->fix_tag = 1; |
} |
} |
|
/* Allocate space for the ".debug" section, and read it. |
We did not read the debug section until now, because |
we didn't want to go to the trouble until someone needed it. */ |
|
static char * |
build_debug_section (bfd *abfd) |
{ |
char *debug_section; |
file_ptr position; |
bfd_size_type sec_size; |
|
asection *sect = bfd_get_section_by_name (abfd, ".debug"); |
|
if (!sect) |
{ |
bfd_set_error (bfd_error_no_debug_section); |
return NULL; |
} |
|
sec_size = sect->size; |
debug_section = (char *) bfd_alloc (abfd, sec_size); |
if (debug_section == NULL) |
return NULL; |
|
/* Seek to the beginning of the `.debug' section and read it. |
Save the current position first; it is needed by our caller. |
Then read debug section and reset the file pointer. */ |
|
position = bfd_tell (abfd); |
if (bfd_seek (abfd, sect->filepos, SEEK_SET) != 0 |
|| bfd_bread (debug_section, sec_size, abfd) != sec_size |
|| bfd_seek (abfd, position, SEEK_SET) != 0) |
return NULL; |
return debug_section; |
} |
|
/* Return a pointer to a malloc'd copy of 'name'. 'name' may not be |
\0-terminated, but will not exceed 'maxlen' characters. The copy *will* |
be \0-terminated. */ |
|
static char * |
copy_name (bfd *abfd, char *name, size_t maxlen) |
{ |
size_t len; |
char *newname; |
|
for (len = 0; len < maxlen; ++len) |
if (name[len] == '\0') |
break; |
|
if ((newname = (char *) bfd_alloc (abfd, (bfd_size_type) len + 1)) == NULL) |
return NULL; |
|
strncpy (newname, name, len); |
newname[len] = '\0'; |
return newname; |
} |
|
/* Read in the external symbols. */ |
|
bfd_boolean |
_bfd_coff_get_external_symbols (bfd *abfd) |
{ |
bfd_size_type symesz; |
bfd_size_type size; |
void * syms; |
|
if (obj_coff_external_syms (abfd) != NULL) |
return TRUE; |
|
symesz = bfd_coff_symesz (abfd); |
|
size = obj_raw_syment_count (abfd) * symesz; |
if (size == 0) |
return TRUE; |
|
syms = bfd_malloc (size); |
if (syms == NULL) |
return FALSE; |
|
if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0 |
|| bfd_bread (syms, size, abfd) != size) |
{ |
if (syms != NULL) |
free (syms); |
return FALSE; |
} |
|
obj_coff_external_syms (abfd) = syms; |
|
return TRUE; |
} |
|
/* Read in the external strings. The strings are not loaded until |
they are needed. This is because we have no simple way of |
detecting a missing string table in an archive. */ |
|
const char * |
_bfd_coff_read_string_table (bfd *abfd) |
{ |
char extstrsize[STRING_SIZE_SIZE]; |
bfd_size_type strsize; |
char *strings; |
file_ptr pos; |
|
if (obj_coff_strings (abfd) != NULL) |
return obj_coff_strings (abfd); |
|
if (obj_sym_filepos (abfd) == 0) |
{ |
bfd_set_error (bfd_error_no_symbols); |
return NULL; |
} |
|
pos = obj_sym_filepos (abfd); |
pos += obj_raw_syment_count (abfd) * bfd_coff_symesz (abfd); |
if (bfd_seek (abfd, pos, SEEK_SET) != 0) |
return NULL; |
|
if (bfd_bread (extstrsize, (bfd_size_type) sizeof extstrsize, abfd) |
!= sizeof extstrsize) |
{ |
if (bfd_get_error () != bfd_error_file_truncated) |
return NULL; |
|
/* There is no string table. */ |
strsize = STRING_SIZE_SIZE; |
} |
else |
{ |
#if STRING_SIZE_SIZE == 4 |
strsize = H_GET_32 (abfd, extstrsize); |
#else |
#error Change H_GET_32 |
#endif |
} |
|
if (strsize < STRING_SIZE_SIZE) |
{ |
(*_bfd_error_handler) |
(_("%B: bad string table size %lu"), abfd, (unsigned long) strsize); |
bfd_set_error (bfd_error_bad_value); |
return NULL; |
} |
|
strings = (char *) bfd_malloc (strsize); |
if (strings == NULL) |
return NULL; |
|
if (bfd_bread (strings + STRING_SIZE_SIZE, strsize - STRING_SIZE_SIZE, abfd) |
!= strsize - STRING_SIZE_SIZE) |
{ |
free (strings); |
return NULL; |
} |
|
obj_coff_strings (abfd) = strings; |
|
return strings; |
} |
|
/* Free up the external symbols and strings read from a COFF file. */ |
|
bfd_boolean |
_bfd_coff_free_symbols (bfd *abfd) |
{ |
if (obj_coff_external_syms (abfd) != NULL |
&& ! obj_coff_keep_syms (abfd)) |
{ |
free (obj_coff_external_syms (abfd)); |
obj_coff_external_syms (abfd) = NULL; |
} |
if (obj_coff_strings (abfd) != NULL |
&& ! obj_coff_keep_strings (abfd)) |
{ |
free (obj_coff_strings (abfd)); |
obj_coff_strings (abfd) = NULL; |
} |
return TRUE; |
} |
|
/* Read a symbol table into freshly bfd_allocated memory, swap it, and |
knit the symbol names into a normalized form. By normalized here I |
mean that all symbols have an n_offset pointer that points to a null- |
terminated string. */ |
|
combined_entry_type * |
coff_get_normalized_symtab (bfd *abfd) |
{ |
combined_entry_type *internal; |
combined_entry_type *internal_ptr; |
combined_entry_type *symbol_ptr; |
combined_entry_type *internal_end; |
size_t symesz; |
char *raw_src; |
char *raw_end; |
const char *string_table = NULL; |
char *debug_section = NULL; |
bfd_size_type size; |
|
if (obj_raw_syments (abfd) != NULL) |
return obj_raw_syments (abfd); |
|
size = obj_raw_syment_count (abfd) * sizeof (combined_entry_type); |
internal = (combined_entry_type *) bfd_zalloc (abfd, size); |
if (internal == NULL && size != 0) |
return NULL; |
internal_end = internal + obj_raw_syment_count (abfd); |
|
if (! _bfd_coff_get_external_symbols (abfd)) |
return NULL; |
|
raw_src = (char *) obj_coff_external_syms (abfd); |
|
/* Mark the end of the symbols. */ |
symesz = bfd_coff_symesz (abfd); |
raw_end = (char *) raw_src + obj_raw_syment_count (abfd) * symesz; |
|
/* FIXME SOMEDAY. A string table size of zero is very weird, but |
probably possible. If one shows up, it will probably kill us. */ |
|
/* Swap all the raw entries. */ |
for (internal_ptr = internal; |
raw_src < raw_end; |
raw_src += symesz, internal_ptr++) |
{ |
|
unsigned int i; |
bfd_coff_swap_sym_in (abfd, (void *) raw_src, |
(void *) & internal_ptr->u.syment); |
symbol_ptr = internal_ptr; |
|
for (i = 0; |
i < symbol_ptr->u.syment.n_numaux; |
i++) |
{ |
internal_ptr++; |
raw_src += symesz; |
bfd_coff_swap_aux_in (abfd, (void *) raw_src, |
symbol_ptr->u.syment.n_type, |
symbol_ptr->u.syment.n_sclass, |
(int) i, symbol_ptr->u.syment.n_numaux, |
&(internal_ptr->u.auxent)); |
coff_pointerize_aux (abfd, internal, symbol_ptr, i, |
internal_ptr); |
} |
} |
|
/* Free the raw symbols, but not the strings (if we have them). */ |
obj_coff_keep_strings (abfd) = TRUE; |
if (! _bfd_coff_free_symbols (abfd)) |
return NULL; |
|
for (internal_ptr = internal; internal_ptr < internal_end; |
internal_ptr++) |
{ |
if (internal_ptr->u.syment.n_sclass == C_FILE |
&& internal_ptr->u.syment.n_numaux > 0) |
{ |
/* Make a file symbol point to the name in the auxent, since |
the text ".file" is redundant. */ |
if ((internal_ptr + 1)->u.auxent.x_file.x_n.x_zeroes == 0) |
{ |
/* The filename is a long one, point into the string table. */ |
if (string_table == NULL) |
{ |
string_table = _bfd_coff_read_string_table (abfd); |
if (string_table == NULL) |
return NULL; |
} |
|
internal_ptr->u.syment._n._n_n._n_offset = |
((bfd_hostptr_t) |
(string_table |
+ (internal_ptr + 1)->u.auxent.x_file.x_n.x_offset)); |
} |
else |
{ |
/* Ordinary short filename, put into memory anyway. The |
Microsoft PE tools sometimes store a filename in |
multiple AUX entries. */ |
if (internal_ptr->u.syment.n_numaux > 1 |
&& coff_data (abfd)->pe) |
internal_ptr->u.syment._n._n_n._n_offset = |
((bfd_hostptr_t) |
copy_name (abfd, |
(internal_ptr + 1)->u.auxent.x_file.x_fname, |
internal_ptr->u.syment.n_numaux * symesz)); |
else |
internal_ptr->u.syment._n._n_n._n_offset = |
((bfd_hostptr_t) |
copy_name (abfd, |
(internal_ptr + 1)->u.auxent.x_file.x_fname, |
(size_t) bfd_coff_filnmlen (abfd))); |
} |
} |
else |
{ |
if (internal_ptr->u.syment._n._n_n._n_zeroes != 0) |
{ |
/* This is a "short" name. Make it long. */ |
size_t i; |
char *newstring; |
|
/* Find the length of this string without walking into memory |
that isn't ours. */ |
for (i = 0; i < 8; ++i) |
if (internal_ptr->u.syment._n._n_name[i] == '\0') |
break; |
|
newstring = (char *) bfd_zalloc (abfd, (bfd_size_type) (i + 1)); |
if (newstring == NULL) |
return NULL; |
strncpy (newstring, internal_ptr->u.syment._n._n_name, i); |
internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t) newstring; |
internal_ptr->u.syment._n._n_n._n_zeroes = 0; |
} |
else if (internal_ptr->u.syment._n._n_n._n_offset == 0) |
internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t) ""; |
else if (!bfd_coff_symname_in_debug (abfd, &internal_ptr->u.syment)) |
{ |
/* Long name already. Point symbol at the string in the |
table. */ |
if (string_table == NULL) |
{ |
string_table = _bfd_coff_read_string_table (abfd); |
if (string_table == NULL) |
return NULL; |
} |
internal_ptr->u.syment._n._n_n._n_offset = |
((bfd_hostptr_t) |
(string_table |
+ internal_ptr->u.syment._n._n_n._n_offset)); |
} |
else |
{ |
/* Long name in debug section. Very similar. */ |
if (debug_section == NULL) |
debug_section = build_debug_section (abfd); |
internal_ptr->u.syment._n._n_n._n_offset = (bfd_hostptr_t) |
(debug_section + internal_ptr->u.syment._n._n_n._n_offset); |
} |
} |
internal_ptr += internal_ptr->u.syment.n_numaux; |
} |
|
obj_raw_syments (abfd) = internal; |
BFD_ASSERT (obj_raw_syment_count (abfd) |
== (unsigned int) (internal_ptr - internal)); |
|
return internal; |
} |
|
long |
coff_get_reloc_upper_bound (bfd *abfd, sec_ptr asect) |
{ |
if (bfd_get_format (abfd) != bfd_object) |
{ |
bfd_set_error (bfd_error_invalid_operation); |
return -1; |
} |
return (asect->reloc_count + 1) * sizeof (arelent *); |
} |
|
asymbol * |
coff_make_empty_symbol (bfd *abfd) |
{ |
bfd_size_type amt = sizeof (coff_symbol_type); |
coff_symbol_type *new_symbol = (coff_symbol_type *) bfd_zalloc (abfd, amt); |
|
if (new_symbol == NULL) |
return NULL; |
new_symbol->symbol.section = 0; |
new_symbol->native = 0; |
new_symbol->lineno = NULL; |
new_symbol->done_lineno = FALSE; |
new_symbol->symbol.the_bfd = abfd; |
|
return & new_symbol->symbol; |
} |
|
/* Make a debugging symbol. */ |
|
asymbol * |
coff_bfd_make_debug_symbol (bfd *abfd, |
void * ptr ATTRIBUTE_UNUSED, |
unsigned long sz ATTRIBUTE_UNUSED) |
{ |
bfd_size_type amt = sizeof (coff_symbol_type); |
coff_symbol_type *new_symbol = (coff_symbol_type *) bfd_alloc (abfd, amt); |
|
if (new_symbol == NULL) |
return NULL; |
/* @@ The 10 is a guess at a plausible maximum number of aux entries |
(but shouldn't be a constant). */ |
amt = sizeof (combined_entry_type) * 10; |
new_symbol->native = (combined_entry_type *) bfd_zalloc (abfd, amt); |
if (!new_symbol->native) |
return NULL; |
new_symbol->symbol.section = bfd_abs_section_ptr; |
new_symbol->symbol.flags = BSF_DEBUGGING; |
new_symbol->lineno = NULL; |
new_symbol->done_lineno = FALSE; |
new_symbol->symbol.the_bfd = abfd; |
|
return & new_symbol->symbol; |
} |
|
void |
coff_get_symbol_info (bfd *abfd, asymbol *symbol, symbol_info *ret) |
{ |
bfd_symbol_info (symbol, ret); |
|
if (coffsymbol (symbol)->native != NULL |
&& coffsymbol (symbol)->native->fix_value) |
ret->value = coffsymbol (symbol)->native->u.syment.n_value - |
(bfd_hostptr_t) obj_raw_syments (abfd); |
} |
|
/* Return the COFF syment for a symbol. */ |
|
bfd_boolean |
bfd_coff_get_syment (bfd *abfd, |
asymbol *symbol, |
struct internal_syment *psyment) |
{ |
coff_symbol_type *csym; |
|
csym = coff_symbol_from (abfd, symbol); |
if (csym == NULL || csym->native == NULL) |
{ |
bfd_set_error (bfd_error_invalid_operation); |
return FALSE; |
} |
|
*psyment = csym->native->u.syment; |
|
if (csym->native->fix_value) |
psyment->n_value = psyment->n_value - |
(bfd_hostptr_t) obj_raw_syments (abfd); |
|
/* FIXME: We should handle fix_line here. */ |
|
return TRUE; |
} |
|
/* Return the COFF auxent for a symbol. */ |
|
bfd_boolean |
bfd_coff_get_auxent (bfd *abfd, |
asymbol *symbol, |
int indx, |
union internal_auxent *pauxent) |
{ |
coff_symbol_type *csym; |
combined_entry_type *ent; |
|
csym = coff_symbol_from (abfd, symbol); |
|
if (csym == NULL |
|| csym->native == NULL |
|| indx >= csym->native->u.syment.n_numaux) |
{ |
bfd_set_error (bfd_error_invalid_operation); |
return FALSE; |
} |
|
ent = csym->native + indx + 1; |
|
*pauxent = ent->u.auxent; |
|
if (ent->fix_tag) |
pauxent->x_sym.x_tagndx.l = |
((combined_entry_type *) pauxent->x_sym.x_tagndx.p |
- obj_raw_syments (abfd)); |
|
if (ent->fix_end) |
pauxent->x_sym.x_fcnary.x_fcn.x_endndx.l = |
((combined_entry_type *) pauxent->x_sym.x_fcnary.x_fcn.x_endndx.p |
- obj_raw_syments (abfd)); |
|
if (ent->fix_scnlen) |
pauxent->x_csect.x_scnlen.l = |
((combined_entry_type *) pauxent->x_csect.x_scnlen.p |
- obj_raw_syments (abfd)); |
|
return TRUE; |
} |
|
/* Print out information about COFF symbol. */ |
|
void |
coff_print_symbol (bfd *abfd, |
void * filep, |
asymbol *symbol, |
bfd_print_symbol_type how) |
{ |
FILE * file = (FILE *) filep; |
|
switch (how) |
{ |
case bfd_print_symbol_name: |
fprintf (file, "%s", symbol->name); |
break; |
|
case bfd_print_symbol_more: |
fprintf (file, "coff %s %s", |
coffsymbol (symbol)->native ? "n" : "g", |
coffsymbol (symbol)->lineno ? "l" : " "); |
break; |
|
case bfd_print_symbol_all: |
if (coffsymbol (symbol)->native) |
{ |
bfd_vma val; |
unsigned int aux; |
combined_entry_type *combined = coffsymbol (symbol)->native; |
combined_entry_type *root = obj_raw_syments (abfd); |
struct lineno_cache_entry *l = coffsymbol (symbol)->lineno; |
|
fprintf (file, "[%3ld]", (long) (combined - root)); |
|
if (! combined->fix_value) |
val = (bfd_vma) combined->u.syment.n_value; |
else |
val = combined->u.syment.n_value - (bfd_hostptr_t) root; |
|
fprintf (file, "(sec %2d)(fl 0x%02x)(ty %3x)(scl %3d) (nx %d) 0x", |
combined->u.syment.n_scnum, |
combined->u.syment.n_flags, |
combined->u.syment.n_type, |
combined->u.syment.n_sclass, |
combined->u.syment.n_numaux); |
bfd_fprintf_vma (abfd, file, val); |
fprintf (file, " %s", symbol->name); |
|
for (aux = 0; aux < combined->u.syment.n_numaux; aux++) |
{ |
combined_entry_type *auxp = combined + aux + 1; |
long tagndx; |
|
if (auxp->fix_tag) |
tagndx = auxp->u.auxent.x_sym.x_tagndx.p - root; |
else |
tagndx = auxp->u.auxent.x_sym.x_tagndx.l; |
|
fprintf (file, "\n"); |
|
if (bfd_coff_print_aux (abfd, file, root, combined, auxp, aux)) |
continue; |
|
switch (combined->u.syment.n_sclass) |
{ |
case C_FILE: |
fprintf (file, "File "); |
break; |
|
case C_STAT: |
if (combined->u.syment.n_type == T_NULL) |
/* Probably a section symbol ? */ |
{ |
fprintf (file, "AUX scnlen 0x%lx nreloc %d nlnno %d", |
(unsigned long) auxp->u.auxent.x_scn.x_scnlen, |
auxp->u.auxent.x_scn.x_nreloc, |
auxp->u.auxent.x_scn.x_nlinno); |
if (auxp->u.auxent.x_scn.x_checksum != 0 |
|| auxp->u.auxent.x_scn.x_associated != 0 |
|| auxp->u.auxent.x_scn.x_comdat != 0) |
fprintf (file, " checksum 0x%lx assoc %d comdat %d", |
auxp->u.auxent.x_scn.x_checksum, |
auxp->u.auxent.x_scn.x_associated, |
auxp->u.auxent.x_scn.x_comdat); |
break; |
} |
/* Otherwise fall through. */ |
case C_EXT: |
case C_AIX_WEAKEXT: |
if (ISFCN (combined->u.syment.n_type)) |
{ |
long next, llnos; |
|
if (auxp->fix_end) |
next = (auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p |
- root); |
else |
next = auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.l; |
llnos = auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_lnnoptr; |
fprintf (file, |
"AUX tagndx %ld ttlsiz 0x%lx lnnos %ld next %ld", |
tagndx, |
(unsigned long) auxp->u.auxent.x_sym.x_misc.x_fsize, |
llnos, next); |
break; |
} |
/* Otherwise fall through. */ |
default: |
fprintf (file, "AUX lnno %d size 0x%x tagndx %ld", |
auxp->u.auxent.x_sym.x_misc.x_lnsz.x_lnno, |
auxp->u.auxent.x_sym.x_misc.x_lnsz.x_size, |
tagndx); |
if (auxp->fix_end) |
fprintf (file, " endndx %ld", |
((long) |
(auxp->u.auxent.x_sym.x_fcnary.x_fcn.x_endndx.p |
- root))); |
break; |
} |
} |
|
if (l) |
{ |
fprintf (file, "\n%s :", l->u.sym->name); |
l++; |
while (l->line_number) |
{ |
fprintf (file, "\n%4d : ", l->line_number); |
bfd_fprintf_vma (abfd, file, l->u.offset + symbol->section->vma); |
l++; |
} |
} |
} |
else |
{ |
bfd_print_symbol_vandf (abfd, (void *) file, symbol); |
fprintf (file, " %-5s %s %s %s", |
symbol->section->name, |
coffsymbol (symbol)->native ? "n" : "g", |
coffsymbol (symbol)->lineno ? "l" : " ", |
symbol->name); |
} |
} |
} |
|
/* Return whether a symbol name implies a local symbol. In COFF, |
local symbols generally start with ``.L''. Most targets use this |
function for the is_local_label_name entry point, but some may |
override it. */ |
|
bfd_boolean |
_bfd_coff_is_local_label_name (bfd *abfd ATTRIBUTE_UNUSED, |
const char *name) |
{ |
return name[0] == '.' && name[1] == 'L'; |
} |
|
/* Provided a BFD, a section and an offset (in bytes, not octets) into the |
section, calculate and return the name of the source file and the line |
nearest to the wanted location. */ |
|
bfd_boolean |
coff_find_nearest_line_with_names (bfd *abfd, |
const struct dwarf_debug_section *debug_sections, |
asection *section, |
asymbol **symbols, |
bfd_vma offset, |
const char **filename_ptr, |
const char **functionname_ptr, |
unsigned int *line_ptr) |
{ |
bfd_boolean found; |
unsigned int i; |
unsigned int line_base; |
coff_data_type *cof = coff_data (abfd); |
/* Run through the raw syments if available. */ |
combined_entry_type *p; |
combined_entry_type *pend; |
alent *l; |
struct coff_section_tdata *sec_data; |
bfd_size_type amt; |
|
/* Before looking through the symbol table, try to use a .stab |
section to find the information. */ |
if (! _bfd_stab_section_find_nearest_line (abfd, symbols, section, offset, |
&found, filename_ptr, |
functionname_ptr, line_ptr, |
&coff_data(abfd)->line_info)) |
return FALSE; |
|
if (found) |
return TRUE; |
|
/* Also try examining DWARF2 debugging information. */ |
if (_bfd_dwarf2_find_nearest_line (abfd, debug_sections, |
section, symbols, offset, |
filename_ptr, functionname_ptr, |
line_ptr, NULL, 0, |
&coff_data(abfd)->dwarf2_find_line_info)) |
return TRUE; |
|
*filename_ptr = 0; |
*functionname_ptr = 0; |
*line_ptr = 0; |
|
/* Don't try and find line numbers in a non coff file. */ |
if (!bfd_family_coff (abfd)) |
return FALSE; |
|
if (cof == NULL) |
return FALSE; |
|
/* Find the first C_FILE symbol. */ |
p = cof->raw_syments; |
if (!p) |
return FALSE; |
|
pend = p + cof->raw_syment_count; |
while (p < pend) |
{ |
if (p->u.syment.n_sclass == C_FILE) |
break; |
p += 1 + p->u.syment.n_numaux; |
} |
|
if (p < pend) |
{ |
bfd_vma sec_vma; |
bfd_vma maxdiff; |
|
/* Look through the C_FILE symbols to find the best one. */ |
sec_vma = bfd_get_section_vma (abfd, section); |
*filename_ptr = (char *) p->u.syment._n._n_n._n_offset; |
maxdiff = (bfd_vma) 0 - (bfd_vma) 1; |
while (1) |
{ |
bfd_vma file_addr; |
combined_entry_type *p2; |
|
for (p2 = p + 1 + p->u.syment.n_numaux; |
p2 < pend; |
p2 += 1 + p2->u.syment.n_numaux) |
{ |
if (p2->u.syment.n_scnum > 0 |
&& (section |
== coff_section_from_bfd_index (abfd, |
p2->u.syment.n_scnum))) |
break; |
if (p2->u.syment.n_sclass == C_FILE) |
{ |
p2 = pend; |
break; |
} |
} |
|
file_addr = (bfd_vma) p2->u.syment.n_value; |
/* PR 11512: Include the section address of the function name symbol. */ |
if (p2->u.syment.n_scnum > 0) |
file_addr += coff_section_from_bfd_index (abfd, |
p2->u.syment.n_scnum)->vma; |
/* We use <= MAXDIFF here so that if we get a zero length |
file, we actually use the next file entry. */ |
if (p2 < pend |
&& offset + sec_vma >= file_addr |
&& offset + sec_vma - file_addr <= maxdiff) |
{ |
*filename_ptr = (char *) p->u.syment._n._n_n._n_offset; |
maxdiff = offset + sec_vma - p2->u.syment.n_value; |
} |
|
/* Avoid endless loops on erroneous files by ensuring that |
we always move forward in the file. */ |
if (p >= cof->raw_syments + p->u.syment.n_value) |
break; |
|
p = cof->raw_syments + p->u.syment.n_value; |
if (p > pend || p->u.syment.n_sclass != C_FILE) |
break; |
} |
} |
|
/* Now wander though the raw linenumbers of the section. */ |
/* If we have been called on this section before, and the offset we |
want is further down then we can prime the lookup loop. */ |
sec_data = coff_section_data (abfd, section); |
if (sec_data != NULL |
&& sec_data->i > 0 |
&& offset >= sec_data->offset) |
{ |
i = sec_data->i; |
*functionname_ptr = sec_data->function; |
line_base = sec_data->line_base; |
} |
else |
{ |
i = 0; |
line_base = 0; |
} |
|
if (section->lineno != NULL) |
{ |
bfd_vma last_value = 0; |
|
l = §ion->lineno[i]; |
|
for (; i < section->lineno_count; i++) |
{ |
if (l->line_number == 0) |
{ |
/* Get the symbol this line number points at. */ |
coff_symbol_type *coff = (coff_symbol_type *) (l->u.sym); |
if (coff->symbol.value > offset) |
break; |
*functionname_ptr = coff->symbol.name; |
last_value = coff->symbol.value; |
if (coff->native) |
{ |
combined_entry_type *s = coff->native; |
s = s + 1 + s->u.syment.n_numaux; |
|
/* In XCOFF a debugging symbol can follow the |
function symbol. */ |
if (s->u.syment.n_scnum == N_DEBUG) |
s = s + 1 + s->u.syment.n_numaux; |
|
/* S should now point to the .bf of the function. */ |
if (s->u.syment.n_numaux) |
{ |
/* The linenumber is stored in the auxent. */ |
union internal_auxent *a = &((s + 1)->u.auxent); |
line_base = a->x_sym.x_misc.x_lnsz.x_lnno; |
*line_ptr = line_base; |
} |
} |
} |
else |
{ |
if (l->u.offset > offset) |
break; |
*line_ptr = l->line_number + line_base - 1; |
} |
l++; |
} |
|
/* If we fell off the end of the loop, then assume that this |
symbol has no line number info. Otherwise, symbols with no |
line number info get reported with the line number of the |
last line of the last symbol which does have line number |
info. We use 0x100 as a slop to account for cases where the |
last line has executable code. */ |
if (i >= section->lineno_count |
&& last_value != 0 |
&& offset - last_value > 0x100) |
{ |
*functionname_ptr = NULL; |
*line_ptr = 0; |
} |
} |
|
/* Cache the results for the next call. */ |
if (sec_data == NULL && section->owner == abfd) |
{ |
amt = sizeof (struct coff_section_tdata); |
section->used_by_bfd = bfd_zalloc (abfd, amt); |
sec_data = (struct coff_section_tdata *) section->used_by_bfd; |
} |
if (sec_data != NULL) |
{ |
sec_data->offset = offset; |
sec_data->i = i - 1; |
sec_data->function = *functionname_ptr; |
sec_data->line_base = line_base; |
} |
|
return TRUE; |
} |
|
bfd_boolean |
coff_find_nearest_line (bfd *abfd, |
asection *section, |
asymbol **symbols, |
bfd_vma offset, |
const char **filename_ptr, |
const char **functionname_ptr, |
unsigned int *line_ptr) |
{ |
return coff_find_nearest_line_with_names (abfd, dwarf_debug_sections, |
section, symbols, offset, |
filename_ptr, functionname_ptr, |
line_ptr); |
} |
|
bfd_boolean |
coff_find_nearest_line_discriminator (bfd *abfd, |
asection *section, |
asymbol **symbols, |
bfd_vma offset, |
const char **filename_ptr, |
const char **functionname_ptr, |
unsigned int *line_ptr, |
unsigned int *discriminator) |
{ |
*discriminator = 0; |
return coff_find_nearest_line_with_names (abfd, dwarf_debug_sections, |
section, symbols, offset, |
filename_ptr, functionname_ptr, |
line_ptr); |
} |
|
|
bfd_boolean |
coff_find_inliner_info (bfd *abfd, |
const char **filename_ptr, |
const char **functionname_ptr, |
unsigned int *line_ptr) |
{ |
bfd_boolean found; |
|
found = _bfd_dwarf2_find_inliner_info (abfd, filename_ptr, |
functionname_ptr, line_ptr, |
&coff_data(abfd)->dwarf2_find_line_info); |
return (found); |
} |
|
int |
coff_sizeof_headers (bfd *abfd, struct bfd_link_info *info) |
{ |
size_t size; |
|
if (!info->relocatable) |
size = bfd_coff_filhsz (abfd) + bfd_coff_aoutsz (abfd); |
else |
size = bfd_coff_filhsz (abfd); |
|
size += abfd->section_count * bfd_coff_scnhsz (abfd); |
return size; |
} |
|
/* Change the class of a coff symbol held by BFD. */ |
|
bfd_boolean |
bfd_coff_set_symbol_class (bfd * abfd, |
asymbol * symbol, |
unsigned int symbol_class) |
{ |
coff_symbol_type * csym; |
|
csym = coff_symbol_from (abfd, symbol); |
if (csym == NULL) |
{ |
bfd_set_error (bfd_error_invalid_operation); |
return FALSE; |
} |
else if (csym->native == NULL) |
{ |
/* This is an alien symbol which no native coff backend data. |
We cheat here by creating a fake native entry for it and |
then filling in the class. This code is based on that in |
coff_write_alien_symbol(). */ |
|
combined_entry_type * native; |
bfd_size_type amt = sizeof (* native); |
|
native = (combined_entry_type *) bfd_zalloc (abfd, amt); |
if (native == NULL) |
return FALSE; |
|
native->u.syment.n_type = T_NULL; |
native->u.syment.n_sclass = symbol_class; |
|
if (bfd_is_und_section (symbol->section)) |
{ |
native->u.syment.n_scnum = N_UNDEF; |
native->u.syment.n_value = symbol->value; |
} |
else if (bfd_is_com_section (symbol->section)) |
{ |
native->u.syment.n_scnum = N_UNDEF; |
native->u.syment.n_value = symbol->value; |
} |
else |
{ |
native->u.syment.n_scnum = |
symbol->section->output_section->target_index; |
native->u.syment.n_value = (symbol->value |
+ symbol->section->output_offset); |
if (! obj_pe (abfd)) |
native->u.syment.n_value += symbol->section->output_section->vma; |
|
/* Copy the any flags from the file header into the symbol. |
FIXME: Why? */ |
native->u.syment.n_flags = bfd_asymbol_bfd (& csym->symbol)->flags; |
} |
|
csym->native = native; |
} |
else |
csym->native->u.syment.n_sclass = symbol_class; |
|
return TRUE; |
} |
|
struct coff_comdat_info * |
bfd_coff_get_comdat_section (bfd *abfd, struct bfd_section *sec) |
{ |
if (bfd_get_flavour (abfd) == bfd_target_coff_flavour |
&& coff_section_data (abfd, sec) != NULL) |
return coff_section_data (abfd, sec)->comdat; |
else |
return NULL; |
} |
|
bfd_boolean |
_bfd_coff_section_already_linked (bfd *abfd, |
asection *sec, |
struct bfd_link_info *info) |
{ |
flagword flags; |
const char *name, *key; |
struct bfd_section_already_linked *l; |
struct bfd_section_already_linked_hash_entry *already_linked_list; |
struct coff_comdat_info *s_comdat; |
|
flags = sec->flags; |
if ((flags & SEC_LINK_ONCE) == 0) |
return FALSE; |
|
/* The COFF backend linker doesn't support group sections. */ |
if ((flags & SEC_GROUP) != 0) |
return FALSE; |
|
name = bfd_get_section_name (abfd, sec); |
s_comdat = bfd_coff_get_comdat_section (abfd, sec); |
|
if (s_comdat != NULL) |
key = s_comdat->name; |
else |
{ |
if (CONST_STRNEQ (name, ".gnu.linkonce.") |
&& (key = strchr (name + sizeof (".gnu.linkonce.") - 1, '.')) != NULL) |
key++; |
else |
/* FIXME: gcc as of 2011-09 emits sections like .text$<key>, |
.xdata$<key> and .pdata$<key> only the first of which has a |
comdat key. Should these all match the LTO IR key? */ |
key = name; |
} |
|
already_linked_list = bfd_section_already_linked_table_lookup (key); |
|
for (l = already_linked_list->entry; l != NULL; l = l->next) |
{ |
struct coff_comdat_info *l_comdat; |
|
l_comdat = bfd_coff_get_comdat_section (l->sec->owner, l->sec); |
|
/* The section names must match, and both sections must be |
comdat and have the same comdat name, or both sections must |
be non-comdat. LTO IR plugin sections are an exception. They |
are always named .gnu.linkonce.t.<key> (<key> is some string) |
and match any comdat section with comdat name of <key>, and |
any linkonce section with the same suffix, ie. |
.gnu.linkonce.*.<key>. */ |
if (((s_comdat != NULL) == (l_comdat != NULL) |
&& strcmp (name, l->sec->name) == 0) |
|| (l->sec->owner->flags & BFD_PLUGIN) != 0) |
{ |
/* The section has already been linked. See if we should |
issue a warning. */ |
return _bfd_handle_already_linked (sec, l, info); |
} |
} |
|
/* This is the first section with this name. Record it. */ |
if (!bfd_section_already_linked_table_insert (already_linked_list, sec)) |
info->callbacks->einfo (_("%F%P: already_linked_table: %E\n")); |
return FALSE; |
} |